<?php

/**
 * UserIdentity represents the data needed to identity a user.
 * It contains the authentication method that checks if the provided
 * data can identity the user.
 */
class UserIdentity extends CUserIdentity {
	/**
	 * Authenticates a user.
	 * The example implementation makes sure if the username and password
	 * are both 'demo'.
	 * In practical applications, this should be changed to authenticate
	 * against some persistent user identity storage (e.g. database).
	 * @return boolean whether authentication succeeds.
	 */
	private $_id;

	public function authenticate() {
		$user = User::model() -> findByAttributes(array('use_username' => $this -> username));
		if($user === null){
			$this -> errorCode = self::ERROR_USERNAME_INVALID;
		}
		else{
			if($user -> use_password !== $this -> password) {
				$this -> errorCode = self::ERROR_PASSWORD_INVALID;
			} 
			else{
				$this -> _id = $user -> use_id;
				if (null === $user->use_lastest_login) {
					$lastLogin = time();
				} 
				else{
					$lastLogin = strtotime($user -> use_lastest_login);
				}
				$this -> setState('lastLoginTime', $lastLogin);
				$this -> errorCode = self::ERROR_NONE;
			}
		}
		return !$this -> errorCode;
	}

	public function getId() {
		return $this -> _id;
	}

}
